Science Fiction Dictionary
A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

 

Multi-Party Quantum Communication Possible

Physicists at the Institute for Quantum Computing at the University of Waterloo have demonstrated distributed communication between three entangled photons, at three different locations. The locations, designated as Alice, Bob, and Charlie in the picture below, are several hundreds of meters apart. This experiment proves quantum nonlocality for more than two entangled photons (see the figure below):


(Photons generated in the lab were beamed to separate trailers)

The experiment demonstrated the distribution of three entangled particles, which can eventually be used to do more than pairwise communication where only one party can communicate with another. It opens the possibility for multipartite quantum communication protocols, including Quantum Key Distribution (QKD), third man cryptography, and quantum secret sharing.

The interesting result is that we now have the ability to do more than paired quantum communication, said the papers lead author Chris Erven, a former IQC PhD student who is now a research assistant at the University of Bristol.

QKD, so far, has been a pairwise system meaning that it works best and with less assumptions when youre only talking with one other person. This is the first experiment where you can now imagine a network of people connected in different ways using the correlations between three or more photons.

As soon as I heard about this successful experiment, I knew I had heard about this kind of communication system before. In James Blish's 1954 story, he introduces the idea of a Dirac Transmitter; the quote below comes from his 1957 novels combined as Cities in Flight. The Dirac transmitter is a multi-party communication system that allows instantaneous communication across the universe:

...one of the things they offer in payment is a new course which they say will take us into an iron-bearing star cluster, very recently settled, where there's likely to be plenty of work for us."

"So they say."

"...and I belive them," Lutz said sharply. "Everything they've said to me, they've also said on the open air, by Dirac transmitter. The cops have heard every word, not only locally, but wherever in the whole universe that there's a Dirac transceiver."

From Kurzweil AI.

Scroll down for more stories in the same category. (Story submitted 3/26/2014)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Communication ")

NYC/Dublin Portal Fails To Meet 'Guardian Of Forever' Standards
I am the Guardian of Forever.

Holobox? Who Doesn't Want A Home Hologram?
'...there appeared standing upon the disk, the image of a man...' - Edmond Hamilton, 1928.

EBS-260 Handjet Free Hand Dot Matrix Printer
'McKie held a chalf-memory stick over the dusted surface.' - Frank Herbert, 1964.

CD, DVD Bit Rot And PKD's Civic Notification Distorter
'...copy two of the original document no longer can be superimposed on copy one.' - Philip K. Dick, 1965.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

Science Fiction Timeline
1600-1899
1900-1939
1940's   1950's
1960's   1970's
1980's   1990's
2000's   2010's

Current News

SliceIt! Why Not Teach Robots To Use Knives?
'One building now gushed forth smoke and another stench that was unmistakable.'

NYC/Dublin Portal Fails To Meet 'Guardian Of Forever' Standards
I am the Guardian of Forever.

FLOAT Levitating Train On The Moon ala Clarke
'The low-slung monorail car, straddling its single track, bored through the shadows on a slowly rising course.'

Singapore Writers Push Back On LLM Training
'...we've promised him a generous pension from the royalties.'

SpaceX Intros Extravehicular Activity Suit
'Provision had been made to meet the terrific cold which we knew would be encountered the moment we had passed beyond the atmosphere.'

Athena Smart Security Guard Robot With Face Recognition
'You are who we say you are, Dr. Dakin,' Turner said.'

The FLUTE Project - A Huge Liquid Mirror In Space
'It's area, and its consequent light-gathering capacity, was many times greater than any rigid mirror...'

Robot Preachers Found To Undermine Religious Commitment
'Tell me your torments,' the Padre said, in an elderly voice marked with compassion.

CyberCab - Tesla Renames The Robotaxi
'A cybercab dogged their heels...'

SpaceHopper Microgravity Robot Lands On Its Feet
'...a slender-legged tripod surmounted by a spherical body no larger than a football.'

Brin's 1990 Novel Earth Still Full Of Predictions
'... making the point that their likenesses, every move they made, were being transmitted.'

'Whisper Mode' ala Blue Thunder Researched At Bristol
'Forest Lawn.'

Gaia - Why Stop With Just The Earth?
'But the stars are only atoms in larger space, and in that larger space the star-atoms could combine to form living matter, thinking matter, couldn't they?'

Microsoft VASA-1 Creates Personal Video From A Photo
'...to build up a video picture would require, say, ten million decisions every second. Mike, you're so fast I can't even think about it. But you aren't that fast.'

Splendid View Of Eclipse From Orbit Visualized And Repurposed By Arthur C. Clarke
'The area affected was five hundred kilometres across, and perfectly circular.'

Bespoke Environment Music From AIs
'Call 'em Winter Mute," said the other, making it two words.'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.